Seiwa SWRx series - Manual (Page 42)

44 User Manual
5.7 The Radar sensitivity appears to be low
Radar sensitivity depends on several factors. To increase sensitivity act as fol-
lows:
♦
Execute the Automatic Tuning procedure to ensure that the Radar is per-
fectly tuned.
♦
Increase the GAIN.
♦
Reduce the STC, since the STC has the effect to reduce the echo intensity
of nearby targets.
♦
Turn Off the FTC, since it has the effect to reduce the echoes intensity of
big targets.
5.8 Radar targets are delayed with respect to the antenna
rotation
The Radar image on the GPS is updated every 2.5 seconds as information is
acquired from the antenna. This could cause a mis-match between the actual
target position and the targets shown on the screen.
5.9 Radar target appear to be pulsing
This is a rather common problem for any Radar. For long distance targets, when
the Radar pulse hits a target, the reflection strength which depends on the hit
angle. Perpendicular hits give the strongest echo. Hard objects give stronger echo
and soft objects give weaker echo.
To eliminate the pulsing effect of Radar targets the Echo Trails function may be
used (see Par. 2.1.6).
5.10 Stationary target appear to be oscillating around their
actual position
Radar targets may appear to be oscillating around their actual position due to the
movement of your vessel. In fact even a minimum oscillation of the position
where the Radar is located may cause an apparent movement of the targets
detected.
For short distance targets, surface waves lower the detectivity. The STC should be
adjusted to properly to maximize the detectivity.